Also fix some issues in the extractors, remove uneeded overrides, use the Java 8 Stream API where possible and replace usages of Utils.UTF_8 with StandardCharsets.UTF_8 in these classes.
Also fix some issues in the extractors, remove uneeded overrides, use the Java 8 Stream API where possible and replace usages of Utils.UTF_8 with StandardCharsets.UTF_8 in these classes.